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A lawman visits the 'Predator' house

by Chris Hansen, Dateline Correspondent

As our "To Catch a Predator" investigation in Flagler Beach, Florida continues, you're going to see something we don't experience very often. It's hard to imagine, but we had an active duty member of law enforcement arrive at our hidden camera house after an extremely graphic online chat with a decoy posing as a 13-year-old girl for nearly a month.

We didn't know it at the time but 41-year-old Todd Spikes was a police officer for the Florala, Alabama Police Department.

He drove more than 300 miles from his home in northern Florida to meet the girl he thought he was chatting with. For awhile we weren't sure he was going to actually show up. He didn't call or send an online message for hours.  Then he called the decoy to say he was in town. We scrambled into position just in time to see Flagler Beach police arrest him. As if it's not scary enough that a lawman would engage in this sort of behavior, wait until you see what police found in his car. There was an arsenal including an assault rifle that was loaded and chambered next to the driver's seat of Spikes' SUV.

Before the night was over we'd find out a lot more about Spikes and what he had stashed in his car and hidden in his pocket. Spikes has pleaded not guilty and his lawyer has suggested he had the weapons as part of his job. He's been fired from the Florala P.D.

Part 2 of 'To Catch a Predator' in Flagler Beach, Fla. airs Tuesday, 8 p.m. on NBC. Click here to read a transcript of the show and to watch the show online

Editor's note: Tomorrow, in another hidden camera investigation, Dateline demonstrates how people might react when they see a potential crime being committed. Watch some surprising and jaw-dropping moments that will show you how a criminal can steal your car, your priceless antique... and even your child... right in broad daylight. Read more about 'Wild Bill: Breaking and Entering.'